WBJEE · Chemistry · Coordination Compounds
Indicate the number of unpaired electrons in \(\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) and \(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\)
- A \(1 \quad 0\)
- B \(5 \quad 6\)
- C \(6 \quad 5\)
- D \(0\quad 1\)
Answer & Solution
Correct Answer
(A) \(1 \quad 0\)
Step-by-step Solution
Detailed explanation
\begin{array}{l} \mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right] \quad \mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right] \\ \mathrm{Fe}=[\mathrm{Ar}] 3 \mathrm{~d}^{6} 4 \mathrm{~s}^{2} \\ \mathrm{Fe}^{+3} \rightarrow(\mathrm{Ar}) 3 \mathrm{~d}^{5} 4…
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